In the diagram below, Black makes the move denoted as “Ne7” which moves the black knight on g8 move to e7.
[FEN "r1bqkbnr/pp3ppp/2n1p3/1BPpP3/8/4B3/PPP2PPP/RN1QK1NR b KQkq - 0 1"] 1... Ne7
The problem is, based on my limited knowledge about chess, “Ne7” should be ambiguous in this case since also the black knight on c6 can also move to e7.
How come we need only to write this move as “Ne7”? Is it simply a wrongfully written move?
I found this PGN online, so I have not written/played them myself. I would rather not go in and correct the moves myself, and I would rather find a way to disambiguate them correctly.